Chapter 6 quiz Flashcards
Diffusion
Movement of particles from high concentration of particles to low concentration of particles/ kinetic energy causes molecules to bump each other until reach equilibrium/ passive- no ATP energy, only kinetic
equilibrium
An equal distribution of molecules in an area
Selectively permeable membrane
Allows some molecules to cross, blocks others/ e.g plasma membranes
Passive transport
No ATPs are used for energy, only kinetic
Facilitated diffusion
Passive diffusion/ use protein channels
osmosis
Osmosis- the diffusion of water from a high concentration of water to a low concentration of water/ only high to low
For osmosis- water moves towards the salt
Diffusion
Particles moving from high concentrations of particles to low
Once reach equal concentrations on both sides of membrane, equilibrium is reached
At equilibrium, particles still move but at the same rate in both directions
Particles go across membrane constantly
What molecules can go through the phospholipid bilayer normally
Molecules such as oxygen and carbon dioxide can go through phospholipid bilayer normally
What molecules need special help to get through the phospholipid bilayer
Molecules such as glucose, water, and sodium need a transport protein
What are the three characteristics of tonicity
hypertonic, hypotonic, isotonic
hypertonic
high concentration of solutes
hypotonic
low concentration of solutes
isotonic
same concentration of solutes on either side of the membrane
Active transport
uses ATP
Opposite of diffusion- movement still occurs towards the higher concentration to the lower concentration, no matter the amount of molecules
This is caused by transport proteins, but they need to use ATP
What are the two types of phagocytosis
2 types- Endo cytosis, Exocytosis
